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48 TROUBLESHOOTING GUIDE
SYMPTOM CAUSE SOLUTION
Unit does not function when Main • No AC Power • Make certain AC power cord is plugged into a live outlet
Power Switch is pushed • Check to see whether outlet is switch-controlled
Display lights, but no sound • Intermittent input connections • Make certain that all input and speaker connections are secure
or picture • Mute is on • Press Mute button
• Volume control is down • Turn up volume control
Unit turns on, but front-panel • Display brightness is turned off • Follow the instructions in the Display Brightness section
display does not light up on page 30 so that the display is set to VFD FULL
No sound from any speaker; • Amplifier is in protection mode • Check speaker wire connections for shorts at receiver and
light around power switch is red due to possible short speaker ends
• Amplifier is in protection mode • Contact your local Harman Kardon service center, which you can
due to internal problems locate by visiting our Web site at www.harmankardon.com
No sound from surround or • Incorrect surround mode • Select a mode other than Stereo or Dolby 3 Stereo
center speakers • Input is monaural • There is no surround information from mono sources
• Incorrect configuration • Check speaker mode configuration
• Stereo or Mono program material • The surround decoder may not create center- or rear-channel
information from nonencoded programs
Unit does not respond to • Weak batteries in remote • Change remote batteries
remote commands • Wrong device selected • Press the AVR selector
• Remote sensor is obscured • Make certain front-panel sensor is visible to remote
or connect remote sensor
Intermittent buzzing in tuner • Local interference • Move unit or antenna away from computers, fluorescent
lights, motors or other electrical appliances
Letters flash in the channel indicator • Digital audio feed paused • Resume play for DVD
display and digital audio stops • Check that Digital Input is selected
Processor Reset
In the rare case in which the unit’s operation or displays
seem abnormal, the cause may involve the erratic
operation of the system’s memory or microprocessor.
To correct this problem,first unplug the unit from the
AC wall outlet and wait at least three minutes. After the
pause, reconnect the AC power cord and check the
unit’s operation. If the system still malfunctions, a sys-
tem “reset” may clear the problem.
To clear the AVR 225’s entire system memory includ-
ing tuner presets, output level settings, delay times and
speaker configuration data, first put the unit in Standby
by pressing the System Power Control Button 2.
Next, press and hold the Tone Mode Button 6 for
three seconds.
The unit will turn on automatically and display the
RESET message in the Main Information
Display S. Note that once you have cleared the
memory in this manner, it is necessary to reestablish all
system configuration settings and tuner presets.
The reset will not affect settings that were pro-
grammed into the remote control. To reset the remote
control and restore it to its factory default settings,
please follow the instructions on page 34.
If these steps do not solve the problem, consult an
authorized Harman Kardon service center. You can
locate the service center nearest to you by visiting our
Web site at www.harmankardon.com.
Memory Backup
This product is equipped with a memory backup
system that preserves the system configuration infor-
mation and tuner presets if the unit is accidentally
unplugged or subjected to a power outage.This mem-
ory will last for approximately one week, after which
time all information must be reentered.
TROUBLESHOOTING GUIDE
Your AVR 225 receiver has been designed to provide many years of trouble-free service. In the event that you are experiencing difficulties, please check the suggestions
below for a possible solution to your problem. Additional information on the AVR 225, including updated information and user hints, is available from our Web site at
www.harmankardon.com.